Method for processing and forming pipe fitting connection end of motorcycle frame

Abstract

The invention discloses a method for processing and forming a pipe fitting connection end of a motorcycle frame. The method comprises the following steps: a, a notch is pre-processed, namely, the notch is processed at the pipe fitting connection end, wherein the depth of the notch is not less than that of arched grooves in the need of being processed; and b, the arched grooves are processed by adopting a die, a punching die is adopted for carrying out punching from top to bottom;, when the punching die is used for carrying out punching, the cutting edge at the lower end cuts in from the innermost edge of the notch, and the two needed arched grooves are punched at the pipe fitting end to be processed after being punched by the punching die. The method disclosed by the invention is capable of greatly increasing the bonding tightness when one pipe fitting is connected with another pipe fitting, so that the welding quality is improved, and the connection intensity is increased; furthermore, the method is suitable for pipe fittings connected in any angle; the pipe diameter application range about the pipe fittings is also very wide; meanwhile, the method disclosed by the invention has the characteristics of high efficiency and low cost and is applied to large-scale popularization and application.

Description

technical field [0001] The invention relates to a processing and forming method for the end of a metal pipe fitting, in particular to a processing and forming method for the connecting end of a motorcycle frame pipe. [0002] Background technique [0003] When the motorcycle frame is produced, it is generally welded with various metal pipe fittings to form the frame. There is usually a certain angle between the pipe fittings welded to each other. In order to increase the reliability of welding, the end of the pipe fitting at the end of the connection is generally processed into a shape that matches the shape of another pipe fitting, that is, at the end of the pipe fitting There are two arc-shaped grooves on the top, which are used to fit and connect with another pipe. If the two pipes are vertically connected, the two arc-shaped grooves are arranged symmetrically. If the two pipes are inclined at a certain angle, the two The arc grooves are one large and one small, so that...

AI Technical Summary

Problems solved by technology

[0004] There are many ways to process the end of this motorcycle metal pipe fitting, the most primitive method is to use milling, turning and milling, but this method has low efficiency, relatively high cost, and large burrs on the processed surface

The second method used is the punching method of double-sided punching, but this method has some limitations, and it cannot cover the end punching of all pipe fittings. For example, the angle of punching tends to be 90° and the diameter of the pipe is smaller. Can't punch

In addition, the consistency after punching on both sides is not easy to achieve, and it is easy to cause inconsistent gaps between the upper and lower cuts, resulting in that the end of the pipe fitting is not tightly fitted when it is fitted with another pipe fitting, which is not conducive to welding

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